Ever since I did maintenance on my 2000 Limited I've had an intermittent check engine light. Took it to Autozone and they pulled a code P0171. I thought I had damaged the MAF sensor when I cleaned it, and had planned on replacing it, but the 4Runner still ran great. I was getting ready to order the sensor today when I figured I better double check to make sure I can't see anything obvious. I pushed on my PCV valve to make sure it was secure and it broke like this:
Could this be the cause of the CEL?